局部阴影条件下光伏阵列MPPT算法研究  

THE MPPT METHOD RESEARCH FOR PV ARRAY UNDER PARTIALLY SHADED CONDITIONS

作　　者：贾林壮[1] 陈侃[1] 李国杰[1] 冯琳[1] 江秀臣[1] 

机构地区：[1]电力传输与功率变换控制教育部重点实验室,上海交通大学电气工程系,上海200240

出　　处：《太阳能学报》2014年第9期1614-1621,共8页Acta Energiae Solaris Sinica

基　　金：国家自然科学基金(50977050);国家高技术研究发展(863)计划(2012AA050204)

摘　　要：详细分析光伏阵列在均匀光照和局部阴影条件下的分段输出特性,并在此基础上提出一种基于分段模型的全局最大功率点跟踪算法,在局部阴影条件下快速定位全局最大功率点(GMPP)所在分段,再结合优化的增量电导法将工作点收敛于GMPP。通过仿真模型,模拟从均匀光照到局部阴影条件再到均匀光照变化过程中新算法的跟踪效果,结果表明,新算法无论在均匀光照还是在局部阴影条件下,均能准确跟踪到GMPP,且工作点在GMPP附近偏差极小。In order to improve energy conversion efficiency, all of PV power systems have MPPT（maximum power point tracking） function. However, the output power-voltage curve presents multi-peak characteristics under PSCs （partially shaded conditions）, which is one challenge of the MPPT technology. This study analyzed the segment characteristics of PV array under uniform irradiance and PSCs in details and then p tracking） algorithm based on the segment model. The proposed roposed a novel GMPPT （ global maximum power point algorithm locates the GMPP （Global Maximum Power Point） segment rapidly and then converges the work point to GMPP using an improved InC （Incremental Conductance） method. The simulation results, which present the whole process from uniform irradiance to PSC and then back to its orifmal, confirm that the proposed algorithm can track the GMPP accurately and rapidly and under PSCs. Also, the lower deviation when reached vicinity of the GMPP is verified in both under uniform irradiance the simulation.

关 键 词：光伏阵列 局部阴影条件 全局最大功率点 分段模型 优化的增量电导法 

分 类 号：TM615[电气工程—电力系统及自动化]